I used ethanol of 95% to extract pigments from areca nuts for 3 days. Centrifuged the extraction and used for uv vis spectrum. However, I do not get any results.
Gangli Zhu
Preliminarily, you can try:
1.Increase the concentration of the extracts
2. Scan with different UV bands to see where the maximum absorption is
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Andras Kovacs
I would even lower the concentration and would check with a whole spectrum check and so on
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